29908589481 has 27 divisors (see below), whose sum is σ = 45905571543. Its totient is φ = 18760639680.

The previous prime is 29908589437. The next prime is 29908589497. The reversal of 29908589481 is 18498580992.

The square root of 29908589481 is 172941.

It is a perfect power (a square), and thus also a powerful number.

29908589481 is a `hidden beast` number, since 2 + 9 + 9 + 0 + 8 + 589 + 48 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 23285234025 + 6623355456 = 152595^2 + 81384^2 .

It is not a de Polignac number, because 29908589481 - 2⁷ = 29908589353 is a prime.

It is a super-2 number, since 2×29908589481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29908584481) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8818296 + ... + 8821686.

Almost surely, 2^29908589481 is an apocalyptic number.

29908589481 is the 172941-st square number.

29908589481 is the 86471-st centered octagonal number.

It is an amenable number.

29908589481 is a deficient number, since it is larger than the sum of its proper divisors (15996982062).

29908589481 is an frugal number, since it uses more digits than its factorization.

29908589481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822 (or 3411 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 63.

The spelling of 29908589481 in words is "twenty-nine billion, nine hundred eight million, five hundred eighty-nine thousand, four hundred eighty-one".